CN114155791A - Display device - Google Patents
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- CN114155791A CN114155791A CN202210081217.4A CN202210081217A CN114155791A CN 114155791 A CN114155791 A CN 114155791A CN 202210081217 A CN202210081217 A CN 202210081217A CN 114155791 A CN114155791 A CN 114155791A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The application relates to a display device, which comprises a sliding scroll and a display module, wherein a supporting layer group in the display module comprises a first area, a third area and a second area connected between the first area and the third area; the display module is arranged on the sliding scroll in a winding mode and can be switched between an unfolding state and a folding state under the driving of the sliding scroll; when the display module is in a retracted state, the second area is at least partially bent to be in contact with the sliding roller, the first area and the third area are oppositely arranged in the first direction, and the elastic modulus of the first area of the support layer group is larger than that of the third area of the support layer group; the first direction is perpendicular to a portion of the flexible display panel supported by the first region and perpendicular to an axial direction of the slider shaft. The display device can avoid accumulation of residual deformation and accumulation of structures in the first area, so that the display module is not prone to bulge, and the flatness of the display module is improved.
Description
Technical Field
The present application relates to the field of display device technology, and in particular, to a display device.
Background
With the development of display technology, the flexible screen capable of being folded and bent greatly improves the use experience of people, so that the flexible screen is more and more widely applied. For example, in the sliding scroll screen technology, the flexible screen is usually rolled on a spindle assembly, and the display area of the flexible screen is changed by stretching and rolling. However, in the stretching process of the flexible screen, bulges easily occur on the flexible screen, so that the flatness of the flexible screen is poor, and the display effect is influenced.
Disclosure of Invention
Therefore, it is necessary to provide a display device for solving the problems that the flexible screen is easy to bulge in the stretching process of the flexible screen, so that the flatness of the flexible screen is poor and the display effect is affected.
According to an aspect of the present application, an embodiment of the present application provides a display device, including: a spool; the display module comprises a flexible display panel and a support layer group which are arranged in a stacked mode, wherein the support layer group comprises a first area, a third area and a second area connected between the first area and the third area; the display module is arranged on the sliding scroll in a winding mode and can be switched between an unfolding state and a folding state under the driving of the sliding scroll; when the display module is in a retracted state, the second area is at least partially bent to be in contact with the sliding roller, the first area and the third area are oppositely arranged in the first direction, and the elastic modulus of the first area of the support layer group is larger than that of the third area of the support layer group; the first direction is perpendicular to a portion of the flexible display panel supported by the first region and perpendicular to an axial direction of the slider shaft.
Foretell display device, elastic modulus through the first region with supporting the bed course sets up to be greater than the elastic modulus who supports the third region of bed course, so, the rigidity of the great first region department of elastic modulus is great relatively, it is stronger to resist to warp and reply smooth ability after warping, first region department more is favorable to releasing the stress in supporting the bed course promptly, thereby avoid behind the display module group slip in first region because stress concentration leads to appearing the accumulational and structure accumulational phenomenon of residual deformation, also make the difficult appearance of display module group bulge among the display device, the roughness of display module group has been improved.
In one embodiment, the elastic modulus of the second region of the support layer set is less than the elastic modulus of the third region of the support layer set. Elastic modulus through the second region with supporting the bed set sets up to be less than the elastic modulus who supports the third region of bed set, so, the rigidity of the less second region department of elastic modulus is less relatively, changes and appears warping, can adapt to the state of crimping deformation better to improve display module and the inseparable degree of laminating of smooth spool.
In one embodiment, the flexible display panel includes a display part and an extension part connected to the display part; when the display module is in a retracted state, the first area is used for supporting the display part, and the second area and the third area are used for supporting the extension part. Through when display module assembly is in the state of packing up, make flexible display panel's display portion supported by the first region of supporting the bed group, the extension is supported by the second region and the third region of supporting the bed group, plays the circumstances of good supporting role to flexible display panel, also makes flexible display panel can support under the drive of bed group and switch between the state of expanding and packing up.
In one embodiment, the support layer group comprises a first support part arranged in the first area and a second support part arranged in the third area; the elastic modulus of the first supporting part is larger than that of the second supporting part; preferably, the support layer group further includes a support sheet, and the first support portion and the second support portion are disposed between the support sheet and the flexible display panel. The first supporting part and the second supporting part are respectively arranged in different areas of the supporting layer group, so that the supporting layer group meets the condition that the elastic modulus of the first area is greater than that of the third area, and the structure of the supporting layer group is simpler. Simultaneously, set up first supporting part and second supporting part between backing sheet and flexible display panel, the backing sheet supports first supporting part and second supporting part simultaneously promptly for the structure of support layer group is more firm, can play stable supporting role to flexible display panel.
In one embodiment, the first supporting part and the second supporting part each include a plurality of at least two sub-supporting parts having different elastic moduli; the sub-support portion closer to the second region of the at least two sub-support portions has a smaller elastic modulus. Through set up a plurality of sub-supporting parts that have different elastic modulus in first supporting part and second supporting part, the quantity of sub-supporting part can carry out the adaptability adjustment to different display module assemblies, the application scope of first supporting part and second supporting part is wider, and the elastic modulus who is close to the sub-supporting part in second region more is less, then first supporting part and second supporting part are in keeping away from one side in second region more be favorable to releasing stress, avoid first supporting part and second supporting part to appear residual deformation accumulation and the accumulational phenomenon of structure in one side that is close to the second region, also make the difficult appearance of display module assembly swell, the roughness of display module assembly has further been improved.
In one embodiment, a filling piece is arranged between any two adjacent sub-supporting parts; the elastic modulus of the filling member is not greater than that of the sub-support portion. Through set up the less filler of elastic modulus between two adjacent sub-support piece, can avoid the stress concentration phenomenon that leads to because the elastic modulus of sub-support part is different at the handing-over department of two sub-support parts, promote display module's roughness.
In one embodiment, a plurality of communication holes are provided in the filler member. Such design makes the filler piece can transmit and release the deformation of sub-supporting part and self through its inside intercommunicating pore, avoids the phenomenon that the sub-supporting part appears residual deformation and accumulates and the structure is piled up under the stress action, improves display module's roughness.
In one embodiment, the communication holes are arranged side by side, and the direction of the axes of the communication holes is parallel to the outer surface of the flexible display panel. The direction of the hole axis of the communicating hole is set to be parallel to the outer surface of the flexible display panel, so that the filling piece can deform along the direction parallel to the outer surface of the flexible display panel, and the stress releasing deformation is convenient to transfer.
In one embodiment, the first and second supports comprise optical glue or foam. First supporting part and second supporting part are made through adopting optical cement or bubble cotton for first supporting part and second supporting part possess elasticity and the deformability of preferred, are favorable to the release of stress.
In one embodiment, the elastic modulus of the first supporting part and the elastic modulus of the second supporting part are not more than 75 kPa. The design enables the first supporting part and the second supporting part to maintain stable structural forms, and the flexible display panel is well supported.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:
fig. 1 is a schematic structural diagram of a display device in a retracted state according to the related art;
fig. 2 is a schematic structural view of a display device in a related art in an unfolded state;
fig. 3 is a schematic view of a laminated structure of a flexible panel in the related art;
fig. 4 is a graph showing a stress of a laminated structure of a flexible panel according to a sliding distance when the display device of the related art is in an unfolded state;
fig. 5 is a graph showing a variation of a lamination end portion dislocation at a fixed side of a flexible panel according to a sliding distance when the display device of the related art is in an unfolded state;
FIG. 6 is a graph showing how the end faults of the laminated structure on the sliding side of the flexible panel vary with the sliding distance when the display device of the related art is in the unfolded state;
fig. 7 is a schematic diagram illustrating a stacked structure of a display module in a display device according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of a display device in a retracted state according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a display device in an expanded state according to an embodiment of the present application.
The reference numbers in the detailed description are as follows:
in the related art:
11: flexible screen, 111: support sheet, 112: support layer, 113: support film, 114: first pressure-sensitive adhesive layer, 115: flexible display panel, 116: second pressure-sensitive adhesive layer, 117: polarizer, 118: optical adhesive layer, 119: a cover plate;
12: a rotating shaft assembly;
13: a fixed side;
14: a slipping side;
in the embodiment of the application:
10: a display module;
100: flexible display panel, 110: display unit, 120: an extension portion;
200: support layer group, 210: first region, 220: second region, 230: third region, 240: first support portion, 250: second support portion, 260: support sheet, 270: sub-support portion, 280: filler, 281: a communicating hole;
20: a spool;
a: a first direction.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Fig. 1 is a schematic structural view of a display device in a related art in a retracted state, and fig. 2 is a schematic structural view of the display device in a related art in an extended state.
As shown in fig. 1 to 2, in the related art, a rollable display device includes a flexible screen 11 and a spindle assembly 12, the flexible screen 11 is rolled on the spindle assembly 12, and a display area of the flexible screen 11 can be changed by stretching and rolling, so that the display device can be switched between a stowed state and a deployed state. For example, the display device in fig. 1 is in a retracted state, the flexible screen 11 has a fixed side 13 and a sliding side 14, and the sliding side 14 and the fixed side 13 of the flexible screen 11 generate relative movement under the driving of the rotating shaft assembly 12, so as to stretch the flexible screen 11 and gradually unfold it until the display device is in an unfolded state in fig. 2. However, in the stretching process of the flexible screen 11, bulges are likely to occur on the flexible screen 11, which results in poor flatness and affects the display effect.
The inventors of the present application, when conducting research and analysis on the cause of the bulge on the flexible screen 11, found that: when the display device is in the retracted state shown in fig. 1, since the flexible screen 11 is wound around the rotary shaft assembly 12, the flexible screen 11 is entirely bent, and a phenomenon of stacking of materials of a laminated structure occurs in the flexible screen 11 at a position of the sliding side 14 close to the rotary shaft assembly 12. And then in the process of stretching the flexible screen 11, the screen body of the sliding side 14 is shortened, the screen body of the fixed side 13 is extended, the stress of the laminated structure in the flexible screen 11 is changed continuously, and when the flexible screen slides to a certain distance, the stress of the laminated structure has an extreme value. Meanwhile, when stretched to the unfolded state of the display device in fig. 2, both ends of the flexible screen 11 may be misaligned due to the deformation of the laminated structure.
Fig. 3 is a schematic diagram of a laminated structure of a flexible panel 11 in the related art, fig. 4 is a graph illustrating a change of a bond line stress of the flexible panel 11 with a sliding distance when a display device in the related art is in a spread state, fig. 5 is a graph illustrating a change of a laminated structure end lamination fault of a fixed side 13 of the flexible panel 11 with the sliding distance when the display device in the related art is in the spread state, and fig. 6 is a graph illustrating a change of a laminated structure end lamination fault of a sliding side 14 of the flexible panel 11 with the sliding distance when the display device in the related art is in the spread state.
Specifically, as shown in fig. 3, the flexible panel 11 in the related art includes a supporting sheet 111, a supporting layer 112, a supporting film 113, a first pressure-sensitive adhesive layer 114, a flexible display panel 115, a second pressure-sensitive adhesive layer 116, a polarizer 117, an optical adhesive layer 118, and a cover plate 119, which are stacked. Fig. 4 shows the change of the stress of the laminated structure of the flexible screen 11 with the sliding distance, and according to the coordinate values corresponding to the longitudinal axis of the curve in the figure, it can be seen that the stress of the glue layer in the flexible screen 11 reaches the maximum at the position of the protrusion in fig. 4, and the deformation of the corresponding laminated structure also reaches the maximum at the same time. Meanwhile, fig. 5 shows the change of the stacking fault of the end of the laminated structure on the fixed side 13 of the flexible screen 11 along with the sliding distance, and it can be seen that the deformation rate of the laminated structure on the fixed side 13 of the flexible screen 11 is faster and slower according to the change of the slope of the curve in the figure, that is, the slope of the curve is larger first and smaller second. Fig. 6 shows the variation of the end faults of the laminated structure on the slip side 14 of the flexible screen 11 with the slip distance, and it can be seen that the deformation rate of the laminated structure on the slip side 14 of the flexible screen 11 is slow first and then fast according to the variation of the slope of the curve in the figure, i.e. the slope of the curve is first small and then large.
In the process of stretching the flexible panel 11, it can be seen from the above analysis that, in the initial stage of stretching, the position of stacking the material of the laminated structure on the slip side 14 in the flexible panel 11 is farther from the end of the slip side 14, and the stress release to the end is limited, and as the remaining length of the screen body on the slip side 14 decreases, the rate of the laminated structure deforming and flowing to the end releasing the stress increases, resulting in an increase in the number of stacking faults. Meanwhile, the length of the screen body of the fixed side 13 in the flexible screen 11 is gradually increased, the capability of sliding to the end part after the laminated structure is stressed and deformed is increasingly poor, the phenomenon of stacking of materials of the laminated structure is caused, the stress of the laminated structure is not timely released, the flexible screen 11 is caused to bulge, and the flatness is poor.
Fig. 7 is a schematic view of a stacked structure of a display module 10 in a display device according to an embodiment of the present disclosure, fig. 8 is a schematic view of a structure of a display device according to an embodiment of the present disclosure in a retracted state, and fig. 9 is a schematic view of a structure of a display device according to an embodiment of the present disclosure in an extended state.
In order to at least partially solve the above problem, please refer to fig. 7 to 9, according to an aspect of the present application, an embodiment of the present application provides a display device, which includes a sliding roller 20 and a display module 10, wherein the display module 10 includes a flexible display panel 100 and a supporting layer group 200, which are stacked, the supporting layer group 200 includes a first region 210, a third region 230, and a second region 220 connected between the first region 210 and the third region 230; the display module 10 is rolled on the sliding roller 20, and the display module 10 is configured to be capable of being switched between an unfolded state and a folded state under the driving of the sliding roller 20.
Wherein, when the display module 10 is in the retracted state, the second region 220 is at least partially bent to contact the sliding roller 20, the first region 210 and the third region 230 are oppositely arranged in the first direction a, and the elastic modulus of the first region 210 of the support layer group 200 is greater than that of the third region 230 of the support layer group 200; the first direction a is perpendicular to the portion of the flexible display panel 100 supported by the first region 210 and perpendicular to the axial direction of the sliding roller 20.
The Display device includes, but is not limited to, a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) Display device, an Organic Light-Emitting Diode (OLED) Display device, and the like. The display module 10 in the display device can realize the display effect of the switchable display panel.
The support layer group 200 is used for supporting the flexible display panel 100, the support layer group 200 has an unlimited structural form, and has a first region 210, a second region 220 and a third region 230 on a surface thereof, the first region 210, the second region 220 and the third region 230 respectively correspond to different positions of the flexible display panel 100, and the second region 220 is connected between the first region 210 and the third region 230 and supports the flexible display panel 100 together. It should be noted that the first region 210, the second region 220, and the third region 230 are divided according to their corresponding different positions or according to their different roles, their respective region sizes are not limited, and there may be no obvious boundary between them.
As shown in fig. 8, the display device is in a collapsed state, the first region 210 of the support layer group 200 supports a portion of the flexible display panel 100, the second region 220 of the support layer group 200 is at least partially bent and contacts the sliding roller 20, the second region 220 and the third region 230 of the support layer group 200 support another portion of the flexible display panel 100, wherein the inner side of the second region 220 contacts the sliding roller 20, the outer side of the second region 220 supports the flexible display panel 100, and the first region 210 and the third region 230 are oppositely disposed in the first direction a.
When the sliding roller 20 moves in a direction perpendicular to the first direction a in the drawing and the sliding roller 20 rotates, the display device can be driven to gradually switch to an unfolding state shown in fig. 9, in the unfolding state, the length of the flexible display panel 100 changes, the portion originally supported by the second region 220 and the third region 230 of the support layer group 200 is gradually unfolded from a winding and folding state, meanwhile, the second region 220 and the third region 230 of the support layer group 200 are also unfolded at the same time, the second region 220 is unfolded to be flush with the first region 210, and the third region 230 is unfolded to be at least partially bent to contact with the sliding roller 20.
The first region 210 of the support layer set 200 has a greater modulus of elasticity than the third region 230 of the support layer set 200. In the elastic deformation stage of the material, the stress and the strain are in a proportional relation, and the proportionality coefficient of the material is called elastic modulus. That is, the elastic modulus is a physical quantity describing the elasticity of a substance, and can be regarded as an index for measuring the difficulty of the material in elastic deformation, and the larger the value of the elastic modulus is, the larger the stress for causing the material to generate certain elastic deformation is, that is, the higher the rigidity of the material is, that is, the smaller the elastic deformation generated under the action of certain stress is. The smaller the value of the elastic modulus, the smaller the stress that causes a certain elastic deformation of the material, i.e. the lower the stiffness of the material, i.e. the greater the elastic deformation that occurs under a certain stress. The expression of the elastic modulus may specifically be "young's modulus", "shear modulus", "bulk modulus", or the like. In the embodiments of the present application, the manner of expression and specific numerical values of the elastic modulus of each region of the support layer group 200 are not particularly limited.
In the display device, the elastic modulus of the first region 210 of the support layer group 200 is set to be greater than the elastic modulus of the third region 230 of the support layer group 200, so that the rigidity of the first region 210 with a large elastic modulus is relatively large, and the ability of resisting deformation and restoring to flatness after deformation is relatively strong, that is, the first region 210 is more favorable for releasing stress in the support layer group 200, thereby avoiding the phenomenon of residual deformation accumulation and structure accumulation caused by stress concentration in the first region 210 after the display module 10 slides, further preventing the display module 10 in the display device from bulging easily, and improving the flatness of the display module 10.
In some embodiments, optionally, the elastic modulus of the second region 220 of the support layer set 200 is less than the elastic modulus of the third region 230 of the support layer set 200.
That is, in the first region 210, the second region 220, and the third region 230 of the support layer group 200, the elastic modulus of the first region 210 is relatively the largest, the elastic modulus of the third region 230 is the second largest, and the elastic modulus of the second region 220 is relatively the smallest, and by setting the elastic modulus of the second region 220 of the support layer group 200 to be smaller than the elastic modulus of the third region 230 of the support layer group 200, the rigidity of the second region 220 with the smaller elastic modulus is relatively smaller, and the deformation is more likely to occur, and the state of the curling deformation can be better adapted, so that the close fit between the display module 10 and the slider shaft 20 is improved.
The first region 210, the second region 220, and the third region 230 of the support layer group 200 respectively correspond to different positions of the flexible display panel 100, and exemplarily, in some embodiments, the flexible display panel 100 includes a display part 110 and an extension part 120 connected to the display part 110; in the retracted state of the display module 10, the first region 210 is used for supporting the display part 110, and the second region 220 and the third region 230 are used for supporting the extension part 120.
The display portion 110, that is, a portion of the flexible display panel 100 for displaying a screen, allows the screen content displayed on the flexible display panel 100 to be viewed directly over the display portion 110. The extension portion 120 is connected to the display portion 110, the extension portion 120 may have a screen display function or may not have a screen display function, and when pixels are provided on the extension portion 120, the extension portion 120 has a function of displaying a screen as in the display portion 110. When no pixel is disposed on the extension portion 120, the extension portion 120 does not have a function of displaying a picture. The embodiment of the present application does not limit whether the extension portion 120 has the screen display function.
When the display module 10 is in the retracted state, the display portion 110 of the flexible display panel 100 is supported by the first region 210 of the supporting layer group 200, and the extending portion 120 is supported by the second region 220 and the third region 230 of the supporting layer group 200, so that the flexible display panel 100 can be switched between the extended state and the retracted state under the driving of the supporting layer group 200 under the condition that the flexible display panel 100 is well supported.
The elastic modulus of different regions of the support layer set 200 is different, and the specific implementation manner thereof may be various, and in some embodiments, the support layer set 200 includes a first support 240 disposed in the first region 210, and a second support 250 disposed in the third region 230; the elastic modulus of the first support part 240 is greater than that of the second support part 250.
That is, in the present embodiment, different support portions are disposed in different regions of the support layer group 200 to achieve the purpose of making the elastic modulus of the different regions different, and by disposing the first support portion 240 and the second support portion 250 in different regions of the support layer group 200 respectively, the elastic modulus of the first support portion 240 is greater than that of the second support portion 250, so that the elastic modulus of the first region 210 of the support layer group 200 is greater than that of the third region 230, and the structure of the support layer group 200 is simpler. In other embodiments, the elastic modulus of different regions may be different by changing the structure, material, etc. of different regions of the support layer group 200, which is not described herein again.
On the basis of the above embodiment, the support layer group 200 further includes a support sheet 260, and the first support part 240 and the second support part 250 are disposed between the support sheet 260 and the flexible display panel 100. Meanwhile, the first supporting portion 240 and the second supporting portion 250 are disposed between the supporting sheet 260 and the flexible display panel 100, that is, the supporting sheet 260 supports the first supporting portion 240 and the second supporting portion 250 at the same time, so that the structure of the supporting layer group 200 is more stable, and the flexible display panel 100 can be stably supported. Specifically, the support piece 260 may be a steel piece or the like.
In order to further improve the flatness of the display module 10, in some embodiments, optionally, each of the first supporting portion 240 and the second supporting portion 250 includes a plurality of at least two sub-supporting portions 270 having different elastic moduli; the sub-support 270 closer to the second region 220 of the at least two sub-supports 270 has a smaller elastic modulus.
As shown in fig. 7, the first supporting part 240 illustratively includes two sub-supporting parts 270, wherein the modulus of elasticity of the sub-supporting part 270 near the second region 220 side is relatively small, and the modulus of elasticity of the sub-supporting part 270 far from the second region 220 side is relatively large. The second supporting portion 250 comprises two sub-supporting portions 270, wherein similarly, the elastic modulus of the sub-supporting portion 270 near the second region 220 side is relatively smaller, and the elastic modulus of the sub-supporting portion 270 far from the second region 220 side is relatively larger, by providing a plurality of sub-supporting portions 270 with different elastic moduli in the first supporting portion 240 and the second supporting portion 250, the number of sub-supporting portions 270 can be adjusted adaptively for different display modules 10, the application range of the first supporting portion 240 and the second supporting portion 250 is wider, and the elastic modulus of the sub-supporting portion 270 closer to the second region 220 is smaller, the first supporting portion 240 and the second supporting portion 250 on the side far from the second region 220 is more beneficial to release stress, and the phenomena of residual deformation accumulation and structure accumulation on the side near the second region 220 of the first supporting portion 240 and the second supporting portion 250 are avoided, and the bulge is not easy to occur on the display module 10, and the flatness of the display module 10 is further improved.
It should be noted that the number of the sub-supporting portions 270 included in the first supporting portion 240 and the number of the sub-supporting portions 270 included in the second supporting portion 250 may be equal or unequal, and the number of the respective sub-supporting portions 270 may be flexibly adjusted according to different application scenarios, which is not particularly limited herein.
The elastic modulus of two adjacent sub-supporting portions 270 are not equal, so as to avoid the phenomena of extrusion and protrusion due to different deformation amounts between the two sub-supporting portions, in some embodiments, optionally, a filling member 280 is disposed between any two adjacent sub-supporting portions 270; the packing 280 has an elastic modulus not greater than that of the sub-support 270.
Through set up the filler 280 that elastic modulus is less between two adjacent sub-support pieces, filler 280 can play the cushioning effect to can assist the release of carrying out stress, so, just can avoid the stress concentration phenomenon that leads to because the elastic modulus of sub-support portion 270 is different at the handing-over department of two sub-support portions 270, promote the roughness of display module assembly 10. The specific material of the filling member 280 is not limited as long as the elastic modulus thereof is not greater than that of the sub-supporting portion 270.
In addition to the above embodiments, further, a plurality of communication holes 281 are provided in the filling member 280. The shape and size of the communication holes 281, the arrangement of the plurality of communication holes 281 in the filling member 280, and the like are not limited. The filling member 280 can be made to form a porous structure by arranging the communication holes 281, so that the filling member 280 can transmit and release the deformation of the sub-support portion 270 and the self through the communication holes 281 in the filling member, the phenomenon that the residual deformation is accumulated and the structure is accumulated under the stress action of the sub-support portion 270 is avoided, and the flatness of the display module 10 is improved.
In some embodiments, optionally, the plurality of communication holes 281 are arranged side by side, and a direction in which hole axes of the communication holes 281 are located is parallel to the outer surface of the flexible display panel 100. Because a plurality of communication holes 281 in the filling member 280 are arranged side by side, and the direction of the hole axis of the communication hole 281 is parallel to the outer surface of the flexible display panel 100, so, when extrusion occurs between two adjacent sub-support portions 270, the filling member 280 can be deformed along the direction of the hole axis of the communication hole 281, that is, along the outer surface of the flexible display panel 100, the stress of the two sub-support portions 270 is released, the stress concentration phenomenon caused by the difference of the elastic modulus of the sub-support portions 270 is avoided, and the flatness of the display module 10 is improved.
The first and second supports 240 and 250 have different elastic moduli, and in some embodiments, optionally, the first and second supports 240 and 250 include optical cement or foam. The first supporting part 240 and the second supporting part 250 are made of optical cement or foam, so that the first supporting part 240 and the second supporting part 250 have better elasticity and deformation capacity, stress release is facilitated, and the first supporting part 240 and the second supporting part 250 can be adjusted conveniently to enable the elastic modulus of the first supporting part 240 to be larger than that of the second supporting part 250.
The expression and specific numerical values of the elastic modulus of the first and second support parts 240 and 250 are not particularly limited. In some embodiments, optionally, neither the first support 240 nor the second support 250 has an elastic modulus greater than 75 kpa. More specifically, the elastic modulus of each of the first and second supporting parts 240 and 250 is not more than 75 kpa in a low temperature state, and the elastic modulus of each of the first and second supporting parts 240 and 250 is not more than 30 kpa in a normal temperature or high temperature state.
Such a design enables the first support part 240 and the second support part 250 to maintain a stable structural configuration, thereby providing a good support effect for the flexible display panel 100.
In the display device, the elastic modulus of the first region 210 of the support layer group 200 is set to be greater than the elastic modulus of the third region 230 of the support layer group 200, so that the rigidity of the first region 210 with a greater elastic modulus is relatively greater, and the ability of resisting deformation and restoring to flatness after deformation is stronger, that is, the first region 210 is more favorable for releasing stress in the support layer group 200, so that when the display module 10 is switched from the retracted state to the extended state, the phenomenon of residual deformation accumulation and structure accumulation caused by stress concentration in the first region 210 after the sliding of the display module 10 is avoided, and thus the display module 10 is not prone to bulge, and the flatness of the display module 10 is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display device, comprising:
a spool; and
the display module comprises a flexible display panel and a support layer group which are arranged in a stacked mode, wherein the support layer group comprises a first area, a third area and a second area connected between the first area and the third area; the display module is arranged on the sliding scroll in a rolling mode and can be switched between an unfolding state and a folding state under the driving of the sliding scroll;
wherein, when the display module is in the retracted state, the second region is at least partially bent to contact the sliding roller, the first region and the third region are oppositely arranged in a first direction, and the elastic modulus of the first region of the support layer group is larger than that of the third region of the support layer group;
the first direction is perpendicular to a portion of the flexible display panel supported by the first region and perpendicular to an axial direction of the sliding roller.
2. The display device according to claim 1, wherein an elastic modulus of the second region of the support layer group is smaller than an elastic modulus of the third region of the support layer group.
3. The display device according to claim 1, wherein the flexible display panel includes a display portion and an extension portion connected to the display portion;
when the display module is in the retracted state, the first area is used for supporting the display part, and the second area and the third area are used for supporting the extension part.
4. The display device according to any one of claims 1 to 3, wherein the support layer group includes a first support portion provided in the first region, and a second support portion provided in the third region;
the elastic modulus of the first supporting part is greater than that of the second supporting part;
preferably, the support layer group further includes a support sheet, and the first support portion and the second support portion are disposed between the support sheet and the flexible display panel.
5. The display device according to claim 4, wherein the first support portion and the second support portion each include a plurality of at least two sub-support portions having different elastic moduli;
the sub-support portion closer to the second region of the at least two sub-support portions has a smaller elastic modulus.
6. The display device according to claim 5, wherein a filler is provided between any adjacent two of the sub-support portions;
the elastic modulus of the filling member is not greater than that of the sub-support portion.
7. The display device according to claim 6, wherein a plurality of communication holes are provided in the filler.
8. The display device according to claim 7, wherein a plurality of the communication holes are arranged side by side, and a direction in which hole axes of the communication holes are located is parallel to an outer surface of the flexible display panel.
9. The display device according to claim 4, wherein the first support and the second support comprise optical glue or foam.
10. The display device according to claim 4, wherein the elastic modulus of each of the first support portion and the second support portion is not more than 75 kPa.
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| CN114155791B (en) | 2024-01-23 |
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